Controversy over museum dedicated to 9/11 victims
But the planned ticket price of $24 (€17) has angered some 9/11 family members.
The opening will follow a May 15 ceremony and a six-day dedication period during which the museum will be open around the clock for family members, rescue and recovery workers and others directly affected by the 2001 attacks, said Joe Daniels, president of the National 9/11 Memorial and Museum.